Teacher asks Little Johnny a simple math question.
Teacher: How many cats would you have if I gave you two, then two more, and then two more?
Johnny: 7!
Teacher: No, pay close attention. How many cats would you have if I gave you two, then two more, and then two more?
Johnny: 7!
Teacher: I’ll put it another way, listen! How many apples would you have if I gave you two, two, two, and two more?
Johnny: 6.
Teacher: Good! Then how many cats would you have if I gave you two now, and two more, and two more?
Johnny: 7!
Teacher: Johnny, how on earth do you manage to get seven, Johnny?
Johnny: Because I’ve already got a freaking cat at home!